Computer Operating Systems

This is a list of the operating systems I know. Each list is in
descending order of current familiarity. For a few of these my
familiarity was only as a user, but for most it went further, as a
system administrator and/or application programmer. I have even
written device drivers and system extensions or customizations for
many of them.

UNIX variants

NetBSD

FreeBSD

Linux

SunOS 4

BSD 4.3

BSD 2.9

SysVr4

Ultrix

6th Edition

Other Operating Systems

IOS (cisco routers)

RT-11

CGW (MIT gateway system, also used by Proteon)

LispM

ITS

RSTS/E

Genera

RSX-11D

VAX/VMS

AmigaDOS/Intuition

DSM-11

RSX-11M

CP/M

DOS-11

TSO

Plus, batch operating systems from NCR and IBM. I'm not sure they had
names, if so I've forgotten what they were called.

Additionally, I have written several from-scratch operating systems for
real-time embedded controls as well as working with several that
others had implemented.

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